Grapes in Microwaves, Robot Playing American Football, & the Sailing Stones of Death Valley

Microwaved grapes make fireballs, and scientists now know why

"GRAPE PLASMA Microwaving grapes creates plasma, and scientists have determined that the effect comes down to a hotspot produced where the two grapes touch. The effect also works with a grape and a hydrogel bead (shown), or two hydrogel beads." ~The Article Itself

---

Sailing Stones of Death Valley

A strange mystery has been studied for over a century. In a desert located in California, stones move, leaving trails in the sediment. This video explains the strange behavior and provides an explanation for the movement.

https://www.geologyin.com/2017/07/death-valleys-moving-rocks.html

---

World's Longest Field Goal- Robot vs NFL Kicker

Mark Rober built a robot that can score field goals from tremendous distances. In his video, he explains the mechanism involved in the kick. He also explains one of NASA's speed calculating techniques.